打印图形 用JAVAfor循环嵌套

Question

1
23
456
78910

Answer 1

题目代码如下

public class Demo {
    public static void main(String[] args) {
        int a=1;
        //打印直角三角形1
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < i + 1; j++) {
                System.out.print(a);
                a++;
            }
            System.out.println();
        }
    }
}

测试截图